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一、概况北京军区281医院供水管线为直径6英寸的铸铁管,全长2.3公里。1942年建成使用。由于年久失修,管内沉积严重、输水能力下降已无法满足医院生产生活的基本要求。为此,该医院多次请有关单位帮助寻找解决办法,但都没有解决。回答是:“四十多年的管道理应报废”。我们从管线的定点解剖发现,在管线0～～50米处,其最小通水直径仅57毫米,见图1。从0～600米管段,平均通水直径95毫米,沉积量为5.35米~3,占管道理论有效容积的51%。全线结垢沉积量为14.95米~3。除管内沉积严重外,且结垢厚度不规则,全线首未端通水直径相差很大。
I. Overview 281 Hospital Beijing Water Supply Pipeline diameter of 6 inches of cast iron pipe, a total length of 2.3 km. Built in 1942 to use. As a result of disrepair, serious sedimentation in the pipe, water transport capacity has been unable to meet the basic requirements of the hospital production and living. To this end, the hospital several times to ask the relevant units to help find solutions, but have not been resolved. The answer is: “The pipeline for more than 40 years should be scrapped.” We found from the pipeline anatomical findings, in the pipeline 0 ~ ~ 50 meters, the minimum water diameter of only 57 mm, shown in Figure 1. From 0 to 600 meters of pipe, the average water diameter of 95 mm, the deposition of 5.35 m ~ 3, accounting for 51% of the theoretical effective volume of the pipeline. Fouling across the board deposition volume of 14.95 m ~ 3. In addition to serious deposits within the tube, and scaling irregularities in thickness, across the board the first end of a large difference between the water diameter.